Re: [PATCH 1/2] PCI: j721e: Allow async probe

[Verma, Achal]

On 7/7/2023 7:53 AM, Li Chen wrote:
> From: Li Chen <lchen@xxxxxxxxxxxxx>
>
> I observed that on Ambarella SoC, which also utilizes
> the Cadence controller, the boot time increases by 1
> second when no endpoints (including switch) are connected
> to PCIe. This increase is caused by cdns_pcie_host_wait_for_link.
>
> Enabling async probe can eliminate this boot time increase.
>
> I guess j721e also has this issue.
I have tested this along with:
https://lore.kernel.org 
/all/1892e2ae15f.f7e5dc061620757.4339091752690983066@linux.beauty/

But I couldn't find second patch in this series.
> Signed-off-by: Li Chen <lchen@xxxxxxxxxxxxx>
Tested-by: Achal Verma <a-verma1@xxxxxx>
> ---
>   drivers/pci/controller/cadence/pci-j721e.c | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/drivers/pci/controller/cadence/pci-j721e.c b/drivers/pci/controller/cadence/pci-j721e.c
> index e70213c9060a..660c13bdb606 100644
> --- a/drivers/pci/controller/cadence/pci-j721e.c
> +++ b/drivers/pci/controller/cadence/pci-j721e.c
> @@ -561,6 +561,7 @@ static struct platform_driver j721e_pcie_driver = {
>   		.name	= "j721e-pcie",
>   		.of_match_table = of_j721e_pcie_match,
>   		.suppress_bind_attrs = true,
> +		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
>   	},
>   };
>   builtin_platform_driver(j721e_pcie_driver);